1531 Каталог MITSUBISHI 2020 Режущий инструмент Фрезы Резцы Сверла Пластины Стр.P075

Каталог MITSUBISHI 2020 Режущий инструмент для станков Стр. P075 1531 Lab2u

CARBIDE OPERATIONAL GUIDANCE FOR THE MHS LONG TYPE DRILL (L/D£10) FLAT FACE DRILLING Drilling a blind hole 1. Drilling a pilot hole 2. Initial cutting with the long type drill Use a drill with a larger (flatter) point angle than the super long type. Use the shortest flute possible. Ensure a high precision hole is drilled for the guide. Drill depth : Approx DCx1. (Adjust the pilot hole depth according to the length of the long type drill.) Penetrate the guide hole at low revolution. (Revolution lOOOmin'1 feed rate 0.2 0.3mm/rev) Stop the long type drill 1 3mm short of the guide hole bottom. 13. Drill the deep hole 14. Drill retraction After drilling, lower the cutting revolution about 0.5 1 mm short of the hole end. (Revolution of around lOOOmin'1) Retract the drill to the pilot hole depth starting point at a feed rate of 3000mm/min. Finally, clear the hole at a cutting speed of 20 30m/min and feed rate of 0.2 0.3mm/rev. INTERRUPED DRILLING Drilling and breaking through on irregular faces or angles 1. Spot facing 2. Drilling a pilot hole Machine a flat or the irregular face by using an end mill or slot drill capable of spot facing. Make the spot face diameter the same size as the required deep hole diameter. Use a drill with a larger (flatter) point angle than the super long type. Use the shortest flute possible. Ensure a high precision hole is drilled for the guide. Drill depth : Approx DC 1. (Adjust the pilot hole depth according to the length of the long type drill.) 13. Initial cutting with the long type drill Penetrate the guide hole at a low revolution. (Revolution lOOOmin'1, feed rate 0.2 0.3mm/rev) Stop the long type drill 0.5 1 mm short of the guide hole bottom. 15. Breaking through 14. Drill the deep hole Start cutting at the recommended speed and feed with a non-peck (continuous feed) cycle. 16. Drill retraction Finally clear the hole at a feed rate of 0.2 0.3mm/rev. (Revolution of around lOOOmin'1) Retract the drill to the pilot hole depth starting point at a feed rate of 3000m m/min. P075 DRILLING